Patents by Inventor George Vlantis

George Vlantis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9179394
    Abstract: A first base station is associated with a first quiet period, and a second base station is associated with a second quiet period. The quiet periods are coordinated so that an amount of overlap between the quiet periods is acceptable. For example, the quiet periods could be coordinated so that no overlap exists between the quiet periods. During the first quiet period, the first base station and/or an associated device (such as a CPE served by the first base station) performs in-band sensing to detect wireless devices that use a first frequency or channel also used by the first base station. During the second quiet period, the first base station and/or a coordinate device (such as a CPE served by the first base station and assisting the second base station) performs out-band sensing to detect wireless devices that use a second frequency or channel also used by the second base station.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: November 3, 2015
    Assignee: STMICROELECTRONICS, INC.
    Inventors: Liwen Chu, Wendong Hu, George Vlantis
  • Patent number: 8913607
    Abstract: The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: December 16, 2014
    Assignees: STMicroelectronics, Inc., STMicroelectronics S.r.l.
    Inventors: Liwen Chu, George Vlantis, Vincenzo Scarpa
  • Patent number: 8553714
    Abstract: A unified contention based protocol is implemented in which a source station within a basic service set selects the protection methodology for data transmission on the communication medium. Utilizing EDCA as a medium access method and maintaining that each transmission opportunity has multiple slots, the source station is provided with the opportunity to select a protection methodology based on the protection environment, which enables transmission opportunity protection without direct PCP involvement.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: October 8, 2013
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Patent number: 8488558
    Abstract: Handover of the role of a personal basic service set coordination point (PCP) in a personal wireless area network occurs with the issuance of a PCP handover request by the existing PCP station. A response from a PCP handover capable station within the BSS includes attributes of the responding station pertinent to its ability to carry out the role of a PCP. Once a new PCP station has been identified, handover steps are undertaken to modify beacon filtering and beam-forming in other non-PCP stations within the BSS to facilitate interruption free transition from the old PCP to the new PCP.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: July 16, 2013
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Patent number: 8483192
    Abstract: A six field address scheme identifies both the originating point and the endpoint of a data frame enabling multiple hop forwarding through a plurality of intermediate mesh points in a wireless mesh network. Data frames originating or ending at a point outside of the wireless mesh network access the wireless network at a mesh access point using a legacy address scheme. The legacy address schemes are converted to a six address scheme using a proxy address table at the access point. Each mesh access point includes not only a routing table but a proxy address table as well as enabling the mesh access point, and/or mesh portal points, to convert address schemes having less than six address fields to the six field format. Subsequent to the conversion, mesh points within the wireless mesh network need only the routing table to facilitate the forwarding of the data frame.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: July 9, 2013
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, Kyeongsoo Kim, George Vlantis
  • Patent number: 8374080
    Abstract: The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: February 12, 2013
    Assignees: STMicroelectronics, Inc., STMicroelectronics Srl
    Inventors: Liwen Chu, George Vlantis, Vincenzo Scarpa
  • Patent number: 8351954
    Abstract: In a PBSS cluster environment, the beacon interval is allocated such that each PBSS in a PBSS cluster possesses its own master sub-beacon interval. Moreover, each member of the PBSS cluster can share unoccupied sub-beacon intervals. When a master PBSS fails to use its own master sub-beacon interval or the beacon intervals which are unoccupied, the available idle time within the beacon interval can be utilized by other member PBSSs in the PBSS cluster. As available or idle beacon interval time is allocated, each master PBSS retains the highest priority to its own master sub-beacon interval thus providing immediate access to a beacon interval when necessary.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: January 8, 2013
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Publication number: 20120063446
    Abstract: In a 60 Hz WGA wireless network, not all frames with the duration field are received by a STA in a WGA network because of directional antennas. Therefore, a NAV Timer cannot account for the reserved duration of the channel by only updating with the longest duration field received. A STA can receive two frames each with a source and destination addresses and update the NAV Timer by comparing the received addresses to overcome such problem. Further, a STA can receive one frame with a source and destination addresses and update the NAV Timer by comparing the received addresses with the NAVSRC and NAVDST values.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 15, 2012
    Applicant: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Publication number: 20110274084
    Abstract: Handover of the role of a personal basic service set coordination point (PCP) in a personal wireless area network occurs with the issuance of a PCP handover request by the existing PCP station. A response from a PCP handover capable station within the BSS includes attributes of the responding station pertinent to its ability to carry out the role of a PCP. Once a new PCP station has been identified, handover steps are undertaken to modify beacon filtering and beam-forming in other non-PCP stations within the BSS to facilitate interruption free transition from the old PCP to the new PCP.
    Type: Application
    Filed: May 6, 2010
    Publication date: November 10, 2011
    Applicant: STMicroelectronics Inc.
    Inventors: Liwen Chu, George Vlantis
  • Publication number: 20100316032
    Abstract: SP recovery between communications of a source and destination apart from the PCP can occur by performing, prior to the initial frame response between a source and a destination, a back-off procedure using back-off parameters for SP recovery when the initiator of a SP cannot receive a responding frame from the destination and detects the communication medium being idle. In alternative embodiments the source and/or destination can send a notification frame to the PCP informing the PCP of transmission failure. When the PCP determines the communication medium to be idle, the PCP truncates and reallocates the remaining portion of the SP.
    Type: Application
    Filed: June 10, 2010
    Publication date: December 16, 2010
    Applicant: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Publication number: 20100315980
    Abstract: A unified contention based protocol is implemented in which a source station within a basic service set selects the protection methodology for data transmission on the communication medium. Utilizing EDCA as a medium access method and maintaining that each transmission opportunity has multiple slots, the source station is provided with the opportunity to select a protection methodology based on the protection environment, which enables transmission opportunity protection without direct PCP involvement.
    Type: Application
    Filed: June 10, 2010
    Publication date: December 16, 2010
    Applicant: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Publication number: 20100317388
    Abstract: In a PBSS cluster environment, the beacon interval is allocated such that each PBSS in a PBSS cluster possesses its own master sub-beacon interval. Moreover, each member of the PBSS cluster can share unoccupied sub-beacon intervals. When a master PBSS fails to use its own master sub-beacon interval or the beacon intervals which are unoccupied, the available idle time within the beacon interval can be utilized by other member PBSSs in the PBSS cluster. As available or idle beacon interval time is allocated, each master PBSS retains the highest priority to its own master sub-beacon interval thus providing immediate access to a beacon interval when necessary.
    Type: Application
    Filed: June 10, 2010
    Publication date: December 16, 2010
    Applicant: STMicroelectronics, Inc.
    Inventors: Liwen Chu, George Vlantis
  • Patent number: 7826422
    Abstract: A method for creating and maintaining semi-dynamic frequency hopping communities. Each community is a set of neighboring cells, such as wireless regional area networks (WRANs) according to IEEE 802.22, that follow a protocol defining coordinated frequency hopping operations, e.g., hopping is performed by community members according to a leader-defined hopping pattern rather than to channels selected in the prior operation period. Each community has one leader base station and one or more community member base stations. The leader determines membership, calculates hopping patterns for all members, and distributes the hopping information to the community members. Members provide their neighborhood and channel availability information, e.g., information about their sensing results and channel usage of neighboring WRANs.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: November 2, 2010
    Assignee: STMicroelectronics, Inc.
    Inventors: Liwen Chu, Wendong Hu, George Vlantis
  • Publication number: 20100177755
    Abstract: The addition of high throughput capability elements to beacon frames and peer link action frames in wireless mesh networks enable the utilization of desirable features without further modifications to the network. Rules can be established for high throughput mesh point protection in a mesh network, Space-time Block Code (STBC) operations and 20/40 MHz operation selections. However, features such as PSMP (power save multi-poll) and PCO (phased coexistence operations) are barred from implementation to prevent collisions.
    Type: Application
    Filed: January 14, 2010
    Publication date: July 15, 2010
    Applicants: STMicroelectronics, Inc., STMicroelectronics Sri
    Inventors: Liwen Chu, George Vlantis, Vincenzo Scarpa
  • Publication number: 20090003291
    Abstract: A six field address scheme identifies both the originating point and the endpoint of a data frame enabling multiple hop forwarding though a plurality of intermediate mesh points in a wireless mesh network. Data frames originating or ending at a point outside of the wireless mesh network access the wireless network at a mesh access point using a legacy address scheme. The legacy address schemes are converted to a six address scheme using a proxy address table at the access point. Each mesh access point includes not only a routing table but a proxy address table as well as enabling the mesh access point, and/or mesh portal points, to convert address schemes having less than six address fields to the six field format. Subsequent to the conversion, mesh points within the wireless mesh network need only the routing table to facilitate the forwarding of the data frame.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Applicant: STMICROELECTRONICS, INC.
    Inventors: Liwen Chu, Kyeongsoo Kim, George Vlantis
  • Publication number: 20080096542
    Abstract: A first base station is associated with a first quiet period, and a second base station is associated with a second quiet period. The quiet periods are coordinated so that an amount of overlap between the quiet periods is acceptable. For example, the quiet periods could be coordinated so that no overlap exists between the quiet periods. During the first quiet period, the first base station and/or an associated device (such as a CPE served by the first base station) performs in-band sensing to detect wireless devices that use a first frequency or channel also used by the first base station. During the second quiet period, the first base station and/or a coordinate device (such as a CPE served by the first base station and assisting the second base station) performs out-band sensing to detect wireless devices that use a second frequency or channel also used by the second base station.
    Type: Application
    Filed: October 11, 2007
    Publication date: April 24, 2008
    Applicant: STMicroelectronics, Inc.
    Inventors: Liwen Chu, Wendong Hu, George Vlantis
  • Publication number: 20070249341
    Abstract: A method for creating and maintaining semi-dynamic frequency hopping communities. Each community is a set of neighboring cells, such as wireless regional area networks (WRANs) according to IEEE 802.22, that follow a protocol defining coordinated frequency hopping operations, e.g., hopping is performed by community members according to a leader-defined hopping pattern rather than to channels selected in the prior operation period. Each community has one leader base station and one or more community member base stations. The leader determines membership, calculates hopping patterns for all members, and distributes the hopping information to the community members. Members provide their neighborhood and channel availability information, e.g., information about their sensing results and channel usage of neighboring WRANs.
    Type: Application
    Filed: April 23, 2007
    Publication date: October 25, 2007
    Applicant: STMICROELECTRONICS, INC.
    Inventors: Liwen Chu, Wendong Hu, George Vlantis